问题
选择题
When the teacher speaks, we have to keep quiet, ?
A．don’t we
B．mustn’t he
C．haven’t we
D．doesn’t he
答案
答案：A
搜题请搜索小程序“爱下问搜题”
When the teacher speaks, we have to keep quiet, ?
A．don’t we
B．mustn’t he
C．haven’t we
D．doesn’t he
答案：A
